从akka http javadsl ResponseEntity中提取响​​应json字符串

Question

我正在尝试向facebook REST API发出请求，并获得JSON响应。我能够在REST客户端中收集响应，因此我知道我在下面的代码中创建HttpRequest时使用的requestUrl是正确的。但是当我尝试使用akka-http javadsl模仿GET时，我无法理解如何从ResponseEntity中提取json。

final HttpRequest request = HttpRequest.GET(requestUrl);
final Materializer materializer = ActorMaterializer.create(this.context.getActorSystem());

final CompletionStage<HttpResponse> responseFuture =
                Http.get(this.context.getActorSystem()).singleRequest(request, materializer);

final HttpResponse response = responseFuture.toCompletableFuture().get();

我期待的回应如下 -

 {
   "data": [
      {
         "cpc": 9.7938056680162,
         "clicks": "247",
         "impressions": "15949",
         "spend": 2419.07,
         "date_start": "2016-06-15",
         "date_stop": "2016-08-13"
      }
   ],
   "paging": {
      "cursors": {
         "before": "MAZDZD",
         "after": "MAZDZD"
      }
   }
}

Answer 1

您应该通过调用ResponseEntity entity = response.entity()并在调用entity.toStrict(timeoutMillis, materialiser).data.decodeString("UTF-8")之后获取响应实体来获取正文字符串

您可以在official API documentation

中查找这些方法的签名